	investors raise stake in purolator pcc two new york management investment firms told the securities and exchange commission they had increased their holdings in purolator courier corp to pct from pct mutual shares corp and mutual qualified income fund inc said they were weighing offers to buy purolator shares from pc uisition inc a unit of e f hutton lbo inc for dlrs a share and from eaf uisitions corp inc a unit of emery air freight corp at dlrs they told the commission they had bought their new purolator shares march for dlrs each reuter 
